# Thread: What is a non permissible value?

1. ## What is a non permissible value?

The question on me sheet is:

Determine the non-permissible values for y=f(x)= x-2
.................................................. .... 6X^2-13x-5

2. Originally Posted by pepperroni
The question on me sheet is:

Determine the non-permissible values for y=f(x)= x-2
.................................................. .... 6X^2-13x-5

non-permissible values of x would be those that make the denominator of the rational expression equal 0.

$6x^2 - 13x - 5 = 0$

solve for x to determine them.

3. i got 6X^2=5/-13 but i dont know what to do next.

Also in a unrelated question.

in the translation y=1/x to y=1/X-3 +4 is the translation 3 right and 4 up?

4. Originally Posted by pepperroni
i got 6X^2=5/-13 but i dont know what to do next.
it's rather obvious that you do not know how to solve quadratic equations.

go and learn how ...

Solving Quadratic Equations: Solving by Factoring

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# what are non permissible values

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